import java.util.Arrays;

public class demo1 {
    public static void main(String[] args) {
        int[]arr={1,2,3};
       transform(arr);
        System.out.println(Arrays.toString(arr));
    }
    public static void transform(int[]arr){
        for (int i =0; i < arr.length ; i++) {
            arr[i]=2*arr[i];

        }
    }
}
